Socket for electric lamps.



W. HERSKOVITZ. socm FOR ELECTRIC LAMPS v APPLICATION FILED JAN. 17. 1914.

1,213,364. S Patented Jan. 23,1917.

WITNESSES v IN VEN TOR area.

WILLIAM HERSKOYITZ, OF CHICAGO, ILLINOIS.

SOCKET FOB ELECTRIC LAMPS.

Specification of Letters Patent.

Patented J an. 23, 1917.

Application filed January 17, 191.4. Serial N 0. 812,709.

To all whom it may concern:

Be it known that I, \VILLIAM HERSKOVITZ, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Sockets for Electric Lamps, of which the following is a specification.

The invention relates more particularly to the details in the construction of the means for and the manner of attaching the stems or hangers of electric lamps that are intended more especially to be supported by pendant chains or the like, to the lamp bodies or sockets andthe object of the invention generally stated is to improve, simplify and cheapen such lamps.

More specifically stated the objects of the invention are to minimize the number and simplify the construction of these stems or hangers, to increase strength and durability,

and to entirely dispense with screw threads or set screws.

With these objects in view the invention consists in the features of novelty that are hereinafter described with reference to the accompanying drawing, which is made a part of this specification, and in which Figure 1 is a sectional elevation of a socket for electric lamps embodying the invention. dome looking upward, in the direction of the arrow2, Fig. 1. Fig. 3 is a view, partly in section and partly in elevation, of the improved stem or hanger before the parts are assembled. Fig. 4 is a detail of a fragment of the crown of the dome. Fig. 5 is a plan view of an annular plate for reinforcing the crown of the dome.

The socket proper, 1, into which the lamp bulb screws has a hollow body portion or shell, 2, which contains the switch mechanism. This body portion is surmounted by a dome, 3,which is removably secured to the body portion or shell by any suitable means as for example by bayonet joints, 4. All of these parts may be of customary construction and as they form no part of the present invention, it is not necessary to here describe them.

It is the stem or hanger by which the lamp is suspended, as by a chain or other pendant support, that embodies the features of novelty in which the present invention Fig. 2 is an inside view of the consists. This hanger comprises a ring, 5, for engagement with the supporting chain, and a hollow shank, 6, the upper end of which is integral with the ring and the lower end of which is permanently and rigidly secured to the crown of the dome.

The upper end of the bore or passage through the shank opens at its upper end on the inside of the ring and at its lower end into the interior of the dome, the object of said bore or passage being to permit the passage of the conductors.

N ear its lower end the shank of the hanger is made of two diameters resulting in annular shoulder, 7 which bears against the top surface of the crown of the dome and that portion, 8, of the shank which is of smaller diameter and is located below the shoulder, 7, passes through a centrally located opening through the crown of the dome and also through the central opening of an annular reinforcing plate, 9, which bears against the under side of the crown of the dome. In assembling the parts, after the reduced end, 8, of the shank is passed through these openings, its lower end which projects slightly from the lower face of the reinforcing plate, is expanded and this may be done by driving into it a suitably shaped expanding toolsay a tapering tool having a number of radial ribs which will result in flaring the end of the shank andforming on its exteriora number of corresponding ribs, to receive which the reinforcing plate may be provided in its inner edge with a number of inwardly presented radial notches, 10. In order to still further insure the rigidity of the attachment, the margin of the crown of the dome, around its central opening, may be provided with a number of tongues or lugs, 11, which project into the notches, l0.

lVhat I claim as new is A socket for electric lamps having a hollow dome having through its crown an opening and a hanger comprising, as an integral structure, a hanger ring, a tubular shank integral therewith, the upper end of said shank opening into the hanger ring and its lower end opening into the dome, the lower portion of said shank being of two diameters resulting in an annular shoulder hearing upon the crown of the dome and below said shoulder a portion of reduced diameter which passes throughthe opening of the the lower end of the shank being expanded dome, and an annular reinforciig dplate so that said tongues occupy said notches. through which also saic portion 0 re uced I diameter passes, the lower end of the shank VILLIAM HLR'SKOVITZ' having tongues and the reinforcing plate Witnesses:

having notches extending-radially outward R. PoHKoFr, from the opening of the reinforcing plate, HENRY M. TATE. 

